Signal Processing
These videos give very good intuition (source)
- https://youtu.be/acAw5WGtzuk
- https://youtu.be/n2y7n6jw5d0
- https://youtu.be/3gjJDuCAEQQ meh
- But what is the Fourier Transform? A visual introduction.
At the root of it
Any signal (even complex ones) can be decomposed into a sum of sinusoids at different frequencies. Understanding how the system responds to sinusoids tells us how it responds to all signals.
I dont understand the mapping from frequency domain to time domain really well. I saw it in CS370 through this worked example but I still forget.
https://github.com/Gongsta/cs370/blob/main/a3/a3q5.ipynb
I don’t understand how time just magically disappears?
And then you can apply a Low-Pass Filter or a High-Pass Filter to eliminate the noise. And that is how you achieve compression.